The Urban Dictionary T-Shirt

noun: This common term can sometimes be used to describe a hard-ass individual who is constantly fighting homosexual urges, partly due to the fact that they are around members of the same sex. Some avid enthusiasts have been known to get the word "mack" tattooed somewhere on their upperbody, usually the chest.

Aaron: "Hey Eric. Did you hear about that mack Shane saying how he wanted to kiss Greg and then try to hide it by sneezing eight times in a row?"

The Urban Dictionary T-Shirt

A complete asshole and waste of time. A Mack will play girls, cheat, pretend to love his gf, and be a complete douche to his exes who dont deserve his shit. Everyone knows him as the one to fuck over girls. A mack doesnt mean any of the shit he will say to earn trust and forgiveness. Macks will let you think your in love and knows how to sweet talk, but inside its all a game for him. Macks should be hated by all.